OPTIM™6 6-Channel Sound Processor with Automatic Sound Tuning Features Fill 1 Hi-Res Audio System Processing (96kHz/24Bit) Digital Inputs: Digital Coax and USB digital (up to 192 kHz/32-bit) Frequency Response: 20Hz-40kHz 31-band Parametric / Graphic EQs Multi-channel Digital Time Alignment Remote Sense-On or Accessories-On Inputs: 6-channel high-level speaker (up to 26V) or 6-channel RCA Intuitive Realtime Sound Set-Up with 5 Minute Vehicle Self-Tuning Manual & Automatic Sound Tuning with PC App Control Automatic Sound Tuning with iPhone App (must be iPhone 10 or newer) Anti-EQ for OEM System (Eliminates Factory EQ Curve) Auto-EQ with APVD Collection which Quickly Creates a Flat Vehicle Response Compatible with the KTX-CSP1 PC Mic Tuning Kit (sold separately) KCE-800BT Bluetooth module Included CSP Controller Included 2 Mounting plates Included Precision Measurement Microphone Tuning Ready with KTX-CSP1 (Sold Separately) Specifications Fill 1 31-Band Parametric and Graphic EQ Outputs: 6-Channel 4V RCA Digital Inputs: Coax, USB (DAC) Speaker Input: Up to 27V Dimensions: 145mm (L) x 151mm (W) x 42.5mm (H)